I've had a Flowjet for about 3 + years...no probs...running 50/50 denatured/alchy. I've used alcohol for about 10 years...and the pumps would crap out just about every year.
The Flowjet is about 3"x 6"...a real monster pump. I have it on the frame near the cannister on the driver's side. I wired past the 100 psi switch so it'll pump even higher ( per Steve's suggestion). Except for that, 4 Aquamist jets, two stage, and a bigger tank it's SMC's. I like to be able to mess with the tuning from inside the car, which for me is necessary whenever the weather changes 10 or 15 degrees. I've had other homemade setups (different pumps, jets, tanks, etc.) and so far this is the best combination I've had.
I run 22lbs of boost with 93 octane...0 KR.
I run a check valve, even though I don't think it's necessary, between the pump and the 1st stage. HTH